---
title: "Token-usage efficiency ratios per model"
method: GET
path: "/v1/analytics/model-router/tokens/efficiency"
tags: ["analytics"]
---

# Token-usage efficiency ratios per model

`GET /v1/analytics/model-router/tokens/efficiency`

## Query parameters

- `operation` string, nullable
- `agent_id` string, uuid, nullable
- `limit` integer
- `start_date` string, date, required
- `end_date` string, date, required

## Response `200`

Successful Response

- TokenEfficiencyRow[]
  - `served_model` string, required
  - `input_tokens` integer, required
  - `output_tokens` integer, required
  - `cache_read_tokens` integer, required
  - `invocations` integer, required
  - `output_per_input_ratio` number, required
  - `cache_read_ratio` number, required
  - `avg_output_tokens` number, required

## Other responses

- `400` — Bad request
- `401` — Authentication required
- `422` — Validation Error

---

[API](https://skmtc.net/oneloop-hq/apis/feather-api.md) · [All operations](https://skmtc.net/oneloop-hq/apis/feather-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/oneloop-hq/feather-api/revisions/5a5597ebb2d6/schema)